RoasTime 3

I ran into a problem today and not sure if it’s software related or not. I was wondering if someone could help out.
I completed one roast and wanted to replay the roast. When I went to replay/preheat right after the first roast, RoasTime wasn’t reading the information from my roaster. It did say my roaster was connected to RoasTime. Now my understanding is that I do not need internet to roast. If I’m wrong please correct me haha. Has anyone had this problem? I am using RoasTime 3. Thanks!